{2532} Primeκαίkai{kahee}Apparently a primary particle, having a copulative and sometimes also a cumulative force; and, also, even, so, then, too, etc.; often used in connection (or composition) with other particles or small words.

{2147} Primeεὑρίσκωheurisko{hyoo-ris'-ko}A prolonged form of a primary word εὕρω [[heuro]], {hyoo'-ro}; which (together with another cognate form, εὑρέω [[heureo]], {hyoo-reh'-o}) is used for it in all the tenses except the present and imperfect; to find (literally or figuratively).

{2532} Primeκαίkai{kahee}Apparently a primary particle, having a copulative and sometimes also a cumulative force; and, also, even, so, then, too, etc.; often used in connection (or composition) with other particles or small words.

{0846} Primeαὐτόςautos{ow-tos'}From the particle αὖ [[au]] (perhaps akin to the base of G0109 through the idea of a baffling wind; backward); the reflexive pronoun self, used (alone or in the compound of G1438) of the third person, and (with the proper personal pronoun) of the other persons.

Revelation 5:4

_ _ and to read  inserted in English Version Greek text without good authority. One oldest manuscript, Origen, Cyprian, and Hilary omit the clause. “To read” would be awkward standing between “to open the book” and “to look thereon.” John having been promised a revelation of “things which must be hereafter,” weeps now at his earnest desire being apparently frustrated. He is a pattern to us to imitate, as an eager and teachable learner of the Apocalypse.

Revelation 5:4

And I wept much  A weeping which sprung from greatness of mind. The tenderness of heart which he always had appeared more clearly now he was out of his own power. The Revelation was not written without tears; neither without tears will it be understood. How far are they from the temper of St. John who inquire after anything rather than the contents of this book! yea, who applaud their own clemency if they excuse those that do inquire into them!

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because:

Revelation 4:1After this I looked, and, behold, a door [was] opened in heaven: and the first voice which I heard [was] as it were of a trumpet talking with me; which said, Come up hither, and I will shew thee things which must be hereafter.Daniel 12:8-9 And I heard, but I understood not: then said I, O my Lord, what [shall be] the end of these [things]? ... And he said, Go thy way, Daniel: for the words [are] closed up and sealed till the time of the end.